A College Professor Testing Two Different Study-Skill Interventions Tosses a Coin

Multiple Choice

A college professor testing two different study-skill interventions tosses a coin to decide which type of training each student will get. The professor does this to

A) make it more likely that participants will be representative of the broader population.
B) make statistical analyses easier by guaranteeing the same number of participants in each group.
C) make it less likely that there will be pre-existing differences between the groups.
D) avoid the confound of participants knowing other people in their group.